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4A0-104 Questions and Answers

Question # 6

On an Alcatel-Lucent 7750 SR, which vc-type will strip service delimiting tags at the ingress PE?

A.

vc-type ether

B.

vc-type vlan

C.

vc-type dotlq

D.

vc-type null

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Question # 7

Which of the following comparisons between E-pipes and VPLSes is FALSE?

A.

They both function as a Layer 2 switch from the service provider's perspective.

B.

They both support SAP encapsulations of null, dot1Q and Q-in-Q.

C.

They both use SAPs as the demarcation point between the customer and the provider.

D.

MAC addresses are learned by VPLSes, but not by E-pipes.

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Question # 8

When configuring distributed services across a network, it is considered best practice to configure which of the following parameters as globally significant?

A.

Customer ID and SAP ID.

B.

Customer ID and Service ID.

C.

SAP ID and Service ID.

D.

SDP ID and Service ID.

E.

SDP ID and SAP ID.

F.

SDP ID and VC ID.

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Question # 9

Which of the following about the VPN-IFV4 address family is FALSE?

A.

VPN-IFV4 allows multiple customers to have overlapping IP addresses.

B.

CE routers use VPN-IPv4 prefixes to differentiate between services.

C.

PE routers are responsible for creating VPN-IPv4 prefixes.

D.

A VPN-IFV4 prefix is composed of a route distinguisher (RD) and an IPv4 address.

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Question # 10

Which of the following about configuring a distributed E-pipe service is TRUE?

A.

The VC ID on the mesh SDP must be explicitly configured.

B.

The VC ID on the spoke SDP must be explicitly configured.

C.

The VC ID on the mesh SDP does not have to be explicitly configured and it will use the service id.

D.

The VC ID on the spoke SDP does not have to be explicitly configured and it will use the service id.

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Question # 11

Click the exhibit.

Which tool produced this output?

A.

ping

B.

Isp-ping

C.

traceroute

D.

Isp-trace

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Question # 12

Which of the following encapsulation types on an Ethernet port support the provisioning of multiple SAPs? (Choose 2)

A.

Dot1Q

B.

Q-in-Q

C.

ATM

D.

NULL

E.

Nil

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Question # 13

What happens when a packet without a VLAN tag is received on a SAP provisioned with null encapsulation while an SDP vc-type is provisioned as vlan?

A.

The frame is dropped.

B.

The service ID is added as the VLAN tag.

C.

A VLAN tag of 0 is added as the provider VLAN tag

D.

The frame is forwarded with no VLAN tag

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Question # 14

Which of the following statements is NOT a valid reason to use MP-BGP as a routing protocol to transport VPRN routes?

A.

The number of VPRN routes can become very large. MP-BGP can support a very large number of routes.

B.

MP-BGP can carry routing information for a number of different address families.

C.

MP-BGP is designed to exchange information between routers that are not directly connected. This feature keeps VPRN routing information out of P-routers.

D.

MP-BGP can carry additional information attached to a route as an optional BGP attribute.

E.

All of the above statements are valid reasons for using MP-BGP as a VPRN routing protocol.

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Question # 15

Click the exhibit.

Part of a 6VPE deployment is shown in this exhibit. Which of the following is the correct configuration and context on PE1 for a BGP peering session with CE1?

A.

Option A

B.

Option B

C.

Option C

D.

Option D

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Question # 16

Click the exhibit.

The two PEs are providing 6VPE and IPv4 VPRNs. The core network is IPv4/MPLS. Which of the following is the BGP family configuration for the MP-BPG on the PEs?

A.

family ipv4 ipv6

B.

family vpn-ipv4ipv6

C.

family vpn-ipv4 vpn-ipv6

D.

family ipv6 vpn-ipv6

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Question # 17

By default, how does a VPLS handle a tagged frame received at the ingress of a null SAP on an Alcatel-Lucent 7750 SR?

A.

The FCS is verified and kept in the customer frame. The VLAN tag is kept and transported over the network.

B.

The FCS is verified and kept in the customer frame. The VLAN tag is removed for transport over the network.

C.

The FCS is verified and removed from the frame. The VLAN tag is kept and transported over the network.

D.

The FCS is verified and removed from the frame. The VLAN tag is removed for transport over the network.

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Question # 18

Which utility on the Alcatel-Lucent 7750SR can be used to investigate an MPLS path?

A.

Isp-trace

B.

Idp-trace

C.

Sdp-ping

D.

Svc-ping

E.

Ping

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Question # 19

Which of the following about 6VPE is FALSE?

A.

To advertise VPN-IPv4 and VPN-IFV6 routes, two MP-BGP sessions are required.

B.

PE routers must support both IPv4 and IPv6 addresses; customer routers can use either one.

C.

MP-BGP is used to advertise IPv6 prefixes and the associated VPRN labels.

D.

The provider core routers are IPv6-unaware.

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Question # 20

Click the exhibit button.

Part of a 6VPE deployment is shown. Which of the following is the correct configuration and context on router CE1 for a BGP peering session with 6VPE1?

A.

Option A

B.

Option B

C.

Option C

D.

Option D

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Question # 21

A CE is connected to an IES interface. Which of the following is TRUE?

A.

The IES's interface must be an IGP peer with the CE.

B.

The IES must use an IP address that is different than the C£.

C.

The IES can only include one SAP for the CE.

D.

The IES must include a network port.

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Question # 22

Which service type is needed to bridge an ATM-attached user and an Ethernet-attached user?

A.

A-pipe

B.

F-pipe

C.

C-pipe

D.

E-pipe

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Question # 23

Which of the following best describes a local Epipe Service?

A.

An Epipe service that has 1 SAP and 1 SDP configured.

B.

An Epipe service that has 3 or more SAPs configured.

C.

An Epipe service that has 2 SAPs on the same router and has no SDPs configured.

D.

An Epipe service that is configured between two routers, each having 1 SAP and 1 SDP configured

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Question # 24

By default, what does an Alcatel-Lucent 7750 SR do to support VPLS services for different customers?

A.

Dedicates a separate port for each customer.

B.

Performs ARP look-ups for each service.

C.

Maintains a different IP routing table for each service.

D.

Maintains a different MAC Forwarding Database for each service.

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Question # 25

Click the exhibit.

Both clips of output are from router R4. The show service command indicates that an SDP is down. What might be the cause?

A.

The mesh SDP on router R4 has been shutdown.

B.

The mesh SDP on 10.10.10.1 has been shutdown.

C.

The service MTU on 10.10.10.1 has been set to a different value.

D.

The IngLbl and EgrLbl that router R4 has for 10.10.10.1 are identical.

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Question # 26

Which protocol is used to signal the service label for a Layer 3 VPRN service?

A.

L-LDP

B.

T-LDP

C.

RSVP-TE

D.

MP-BGP

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Question # 27

Click the exhibit.

PE1 and PE2 are Alcatel-Lucent 7750 SRs.What needs to be added to PE1's configuration to mirror traffic between PE2 and the customer site?

A.

A "remote-source" needs to be added to the mirror destination on PEL

B.

A mirror source needs to be added to PE1 with a "remote-source".

C.

This is not possible since the protocol analyzer is located at the Central Office.It needs to be at the customer site.

D.

A mirror source with SAP 1/1/2 needs to be added on PEL

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Question # 28

Which of the following about the components of a service on the Alcatel-Lucent 7750 SR is FALSE?

A.

An SDP can be used by more than one service and customer.

B.

A SAP can only be created on an access port.

C.

A customer can have multiple services associated to it.

D.

A customer is only created on one site of a distributed service.

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Question # 29

Which one of the following items CANNOT be used as a mirror source on an Alcatel-Lucent 7750 SR?

A.

IP filter

B.

MAC filter

C.

Egress label

D.

Ingress label

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Question # 30

When using MP-BGP for an IPv4 VPRN service, what address family needs to be used for a PE-CE BGP session?

A.

The VPN-IPv4 address family.

B.

The IPv4 address family.

C.

Either IPv4 or VPN-IPv4 address families can be configured.

D.

The same address family must be used for the provider network and the PE-CE.

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Question # 31

Which of the following statements best describes the flooding of traffic on a PE when traffic is received on a spoke SDP?

A.

Traffic is flooded to all SAPs in the service.

B.

Traffic is flooded to all SAPs and spoke SDPs in the service.

C.

Traffic is flooded to all SAPs and mesh SDPs in the service.

D.

Traffic is flooded to all SAPs, spoke SDPs, and mesh SDPs in the service

E.

The traffic is not flooded.

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Question # 32

Click on the exhibit button below.

Which of the following is the correct configuration on 6VPE1 for a BGP peering session with CE1?

A.

PE1>config>service>vpm>bgp#info

---------------------------------------------------

group "toCE1"

family ipv6

export "mbgp-bgp"

neighbor 2001:db8:12::1

peer-as 64497

exit

exit

B.

PE1>config>service>vpm>bgp#info

---------------------------------------------------

group "toCE1"

family ipv6

export "mbgp-bgp"

neighbor 2001:db8:12:1

peer-as 64496

exit

exit

C.

PE1>config>router>bgp#info

---------------------------------------------------

group "toCEl"

family ipv6

export "mbgp-bgp"

neighbor 2001 db8:12::1

peer-as 64497

exit

exit

D.

PE1>config>router>bgp#info

---------------------------------------------------

group "toCE1"

family ipv6

export "mbgp-bgp"

neighbor 2001:db8:12::1

peer-as 64496

exit

exit

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Question # 33

Which of the following items can NOT be used as a mirror source?

A.

A physical port.

B.

ASAP.

C.

Ingress MPLS frames with a specific label.

D.

Entries that match an IP filter.

E.

Entries that match a MAC filter.

F.

All of the above can be used as a mirror source.

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Question # 34

Which of the following statements best describes a route target?

A.

A route target is a BGP extended community used to identify the VRF table for a prefix at the receiving PE

B.

A route target is a mechanism from which VPRN controls the distribution of VPN routing information.

C.

Route target attributes are earned in a MP-BGP as attributes of the route.

D.

A route target is used by the PE router to identify the VRF that a VPN-lPv4 prefix is associated with.

E.

All of the above statements describe a route target

F.

None of the above statements describe a route target

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Question # 35

Which routing protocol cannot be run over an Ipipe?

A.

OSPF

B.

RIP

C.

BGP

D.

IS-IS

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Question # 36

Which of the following options are used to configure an MPLS signaling type to be used on an SDP? (Choose 2)

A.

configure service sdp sdp-id gre create

B.

configure service sdp sdp-id create

C.

Idp

D.

Isp Isp-name

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Question # 37

When configuring an IES spoke termination to a VPLS, what must be explicitly configured in order for the service to come up? (Choose 2)

A.

MTU must match on both services,

B.

Mesh-SDP with matching vc-id configured,

C.

Spoke-SDP with matching vc-id configured.

D.

Spoke-SDP.

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Question # 38

Which of the following statements is FALSE regarding 6VPE?

A.

6VPE is a tunneling technology that makes use of MPLS tunnels to transport IPv6 information over an IPv4 MPLS infrastructure.

B.

Customers connected to 6VPE could run native IPv6 or IPv4.

C.

On the PE router, the next hop for a VPN IPv6 address is an IPv6 address, regardless of the nature of the network between the PEs.

D.

6VPE requires an IPv6-aware MPLS core.

E.

Both C and D are false.

F.

All of the above statements are true.

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Question # 39

Which of the following statements are TRUE about configuring a distributed Epipe service? (Choose 2)

A.

The vc-id on the spoke-sdp must be explicitly configured.

B.

The vc-id on the mesh-sdp must be explicitly configured.

C.

The vc-id on the spoke-sdp can be configured to match the service id.

D.

The vc-id on the mesh-sdp can be configured to match the service id.

E.

The vc-id on the spoke-sdp does not have to be explicitly configured and will use the service id.

F.

The vc-id on the mesh-sdp does not have to be explicitly configured and will use the service id.

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Question # 40

In a Layer 2 encapsulation, using Martini, what does the first (top) label represent?

A.

Tunnel Label

B.

VC Label

C.

Operational Control Word

D.

UNI

E.

NNI

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Question # 41

A service provider wishes to configure a Layer 2 service that will forward customer VLAN tags. When configuring an SDP for the service, which vc-type will forward service delimiting tags on the ingress PE?

A.

vc-type ether

B.

vc-type vlan

C.

vc-type dot1q

D.

vc-type null

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Question # 42

Which service type would be used to provide a bi-directional Layer 2 connection of TDM circuits over an IP/MPLS network?

A.

A-pipe

B.

E-pipe

C.

I-pipe

D.

F-pipe

E.

C-pipe

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Question # 43

Which of the following best describes a VPWS?

A.

Layer 3 direct Internet access service.

B.

Layer 2 point-to-point service.

C.

Layer 2 multipoint-to-multipoint service.

D.

Layer 3 IP multipoint-to-multipoint VPN service.

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